Holland Forge, Thermometer, Digital, Nutrient Tank, Grow Room Temperature & Humidity
Click on Image to see better/larger version.
DT-3
An
all in one Thermometer and Hygrometer.
This
handy unit measures the temperature and relative humidity of the area in
which the unit is located. It has a memory function, which records the minimum
and maximum temperatures. As well as that, it has a probe which can be
placed in a nutrient tank or to an outside room, that also measures
temperature.